fbdev/core/fb_chrdev.c

23 	struct fb_info *info = registered_fb[fbidx];
25 	if (info != file->private_data)
26 		info = NULL;
27 	return info;
32 	struct fb_info *info = file_fb_info(file);
34 	if (!info)
37 	if (fb_WARN_ON_ONCE(info, !info->fbops->fb_read))
40 	if (info->state != FBINFO_STATE_RUNNING)
43 	return info->fbops->fb_read(info, buf, count, ppos);
48 	struct fb_info *info = file_fb_info(file);
50 	if (!info)
53 	if (fb_WARN_ON_ONCE(info, !info->fbops->fb_write))
56 	if (info->state != FBINFO_STATE_RUNNING)
59 	return info->fbops->fb_write(info, buf, count, ppos);
62 static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
75 		lock_fb_info(info);
76 		var = info->var;
77 		unlock_fb_info(info);
87 		lock_fb_info(info);
88 		ret = fbcon_modechange_possible(info, &var);
90 			ret = fb_set_var(info, &var);
92 			fbcon_update_vcs(info, var.activate & FB_ACTIVATE_ALL);
93 		unlock_fb_info(info);
99 		lock_fb_info(info);
100 		memcpy(&fix, &info->fix, sizeof(fix));
101 		if (info->flags & FBINFO_HIDE_SMEM_START)
103 		unlock_fb_info(info);
110 		ret = fb_set_user_cmap(&cmap, info);
115 		lock_fb_info(info);
116 		cmap_from = info->cmap;
117 		unlock_fb_info(info);
124 		lock_fb_info(info);
125 		ret = fb_pan_display(info, &var);
126 		unlock_fb_info(info);
144 		lock_fb_info(info);
145 		ret = fb_blank(info, arg);
147 		fbcon_fb_blanked(info, arg);
148 		unlock_fb_info(info);
152 		lock_fb_info(info);
153 		fb = info->fbops;
155 			ret = fb->fb_ioctl(info, cmd, arg);
158 		unlock_fb_info(info);
165 	struct fb_info *info = file_fb_info(file);
167 	if (!info)
169 	return do_fb_ioctl(info, cmd, arg);
199 static int fb_getput_cmap(struct fb_info *info, unsigned int cmd,
219 		return fb_set_user_cmap(&cmap, info);
221 	lock_fb_info(info);
222 	cmap_from = info->cmap;
223 	unlock_fb_info(info);
261 static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd,
266 	lock_fb_info(info);
267 	fix = info->fix;
268 	if (info->flags & FBINFO_HIDE_SMEM_START)
270 	unlock_fb_info(info);
277 	struct fb_info *info = file_fb_info(file);
281 	if (!info)
283 	fb = info->fbops;
293 		ret = do_fb_ioctl(info, cmd, arg);
297 		ret = fb_get_fscreeninfo(info, cmd, arg);
302 		ret = fb_getput_cmap(info, cmd, arg);
307 			ret = fb->fb_compat_ioctl(info, cmd, arg);
316 	struct fb_info *info = file_fb_info(file);
319 	if (!info)
322 	if (fb_WARN_ON_ONCE(info, !info->fbops->fb_mmap))
325 	mutex_lock(&info->mm_lock);
326 	res = info->fbops->fb_mmap(info, vma);
327 	mutex_unlock(&info->mm_lock);
333 __acquires(&info->lock)
334 __releases(&info->lock)
337 	struct fb_info *info;
340 	info = get_fb_info(fbidx);
341 	if (!info) {
343 		info = get_fb_info(fbidx);
344 		if (!info)
347 	if (IS_ERR(info))
348 		return PTR_ERR(info);
350 	lock_fb_info(info);
351 	if (!try_module_get(info->fbops->owner)) {
355 	file->private_data = info;
356 	if (info->fbops->fb_open) {
357 		res = info->fbops->fb_open(info, 1);
359 			module_put(info->fbops->owner);
362 	if (info->fbdefio)
363 		fb_deferred_io_open(info, inode, file);
366 	unlock_fb_info(info);
368 		put_fb_info(info);
373 __acquires(&info->lock)
374 __releases(&info->lock)
376 	struct fb_info * const info = file->private_data;
378 	lock_fb_info(info);
380 	if (info->fbdefio)
381 		fb_deferred_io_release(info);
383 	if (info->fbops->fb_release)
384 		info->fbops->fb_release(info, 1);
385 	module_put(info->fbops->owner);
386 	unlock_fb_info(info);
387 	put_fb_info(info);
396 	struct fb_info * const info = filp->private_data;
397 	unsigned long fb_size = PAGE_ALIGN(info->fix.smem_len);
402 	return (unsigned long)info->screen_base + pgoff;